// Emacs style mode select	 -*- C++ -*-
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
//		DOOM selection menu, options, episode etc.
//		Sliders and icons. Kinda widget stuff.
//
//-----------------------------------------------------------------------------

static const char
rcsid[] = "$Id: m_menu.c,v 1.7 1997/02/03 22:45:10 b1 Exp $";



#include "doomdef.h"
#include "dstrings.h"

#include "d_main.h"

#include "i_system.h"
#include "i_video.h"
#include "z_zone.h"
#include "v_video.h"
#include "w_wad.h"

#include "r_local.h"


#include "hu_stuff.h"

#include "g_game.h"

#include "m_argv.h"
#include "m_swap.h"

#include "s_sound.h"

#include "doomstat.h"

// Data.
#include "sounds.h"

#include "m_menu.h"



extern patch_t*			hu_font[HU_FONTSIZE];
extern boolean			message_dontfuckwithme;

extern boolean			chat_on;				// in heads-up code

//
// defaulted values
//
int						mouseSensitivity;		// has default

// Show messages has default, 0 = off, 1 = on
int						showMessages;


// Blocky mode, has default, 0 = high, 1 = normal
int						detailLevel;
int						screenblocks;			// has default

// temp for screenblocks (0-9)
int						screenSize;

// -1 = no quicksave slot picked!
int						quickSaveSlot;

// 1 = message to be printed
int						messageToPrint;
// ...and here is the message string!
char*					messageString;

// message x & y
int						messx;
int						messy;
int						messageLastMenuActive;

// timed message = no input from user
boolean					messageNeedsInput;

void	(*messageRoutine)(int response);

#define SAVESTRINGSIZE	24

char gammamsg[5][26] =
{
    GAMMALVL0,
    GAMMALVL1,
    GAMMALVL2,
    GAMMALVL3,
    GAMMALVL4
};

// we are going to be entering a savegame string
int						saveStringEnter;
int						saveSlot;		// which slot to save in
int						saveCharIndex;	// which char we're editing
// old save description before edit
char					saveOldString[SAVESTRINGSIZE];

boolean					inhelpscreens;
boolean					menuactive;

#define SKULLXOFF				-32
#define LINEHEIGHT				16

extern boolean			sendpause;
char					savegamestrings[10][SAVESTRINGSIZE];

char	endstring[160];


//
// MENU TYPEDEFS
//
typedef struct
{
    // 0 = no cursor here, 1 = ok, 2 = arrows ok
    short		status;

    char		name[10];

    // choice = menu item #.
    // if status = 2,
    //	 choice=0:leftarrow,1:rightarrow
    void		(*routine)(int choice);

    // hotkey in menu
    char		alphaKey;
} menuitem_t;



typedef struct menu_s
{
    short				numitems;		// # of menu items
    struct menu_s*		prevMenu;		// previous menu
    menuitem_t*			menuitems;		// menu items
    void				(*routine)();	// draw routine
    short				x;
    short				y;				// x,y of menu
    short				lastOn;			// last item user was on in menu
} menu_t;

short			itemOn;					// menu item skull is on
short			skullAnimCounter;		// skull animation counter
short			whichSkull;				// which skull to draw

// graphic name of skulls
// warning: initializer-string for array of chars is too long
char	skullName[2][/*8*/9] = {"M_SKULL1","M_SKULL2"};

// current menudef
menu_t* currentMenu;

//
// PROTOTYPES
//
void M_NewGame(int choice);
void M_Episode(int choice);
void M_ChooseSkill(int choice);
void M_LoadGame(int choice);
void M_SaveGame(int choice);
void M_Options(int choice);
void M_EndGame(int choice);
void M_ReadThis(int choice);
void M_ReadThis2(int choice);
void M_QuitDOOM(int choice);

void M_ChangeMessages(int choice);
void M_ChangeSensitivity(int choice);
void M_SfxVol(int choice);
void M_MusicVol(int choice);
void M_ChangeDetail(int choice);
void M_SizeDisplay(int choice);
void M_StartGame(int choice);
void M_Sound(int choice);

void M_FinishReadThis(int choice);
void M_LoadSelect(int choice);
void M_SaveSelect(int choice);
void M_ReadSaveStrings(void);
void M_QuickSave(void);
void M_QuickLoad(void);

void M_DrawMainMenu(void);
void M_DrawReadThis1(void);
void M_DrawReadThis2(void);
void M_DrawNewGame(void);
void M_DrawEpisode(void);
void M_DrawOptions(void);
void M_DrawSound(void);
void M_DrawLoad(void);
void M_DrawSave(void);

void M_DrawSaveLoadBorder(int x,int y);
void M_SetupNextMenu(menu_t *menudef);
void M_DrawThermo(int x,int y,int thermWidth,int thermDot);
void M_DrawEmptyCell(menu_t *menu,int item);
void M_DrawSelCell(menu_t *menu,int item);
void M_WriteText(int x, int y, char *string);
int	 M_StringWidth(char *string);
int	 M_StringHeight(char *string);
void M_StartControlPanel(void);
void M_StartMessage(char *string,void *routine,boolean input);
void M_StopMessage(void);
void M_ClearMenus (void);




//
// DOOM MENU
//
enum
{
    newgame = 0,
    options,
    loadgame,
    savegame,
    readthis,
    quitdoom,
    main_end
} main_e;

menuitem_t MainMenu[]=
{
    {1,"M_NGAME",M_NewGame,'n'},
    {1,"M_OPTION",M_Options,'o'},
    {1,"M_LOADG",M_LoadGame,'l'},
    {1,"M_SAVEG",M_SaveGame,'s'},
    // Another hickup with Special edition.
    {1,"M_RDTHIS",M_ReadThis,'r'},
    {1,"M_QUITG",M_QuitDOOM,'q'}
};

menu_t	MainDef =
{
    main_end,
    NULL,
    MainMenu,
    M_DrawMainMenu,
    97,64,
    0
};


//
// EPISODE SELECT
//
enum
{
    ep1,
    ep2,
    ep3,
    ep4,
    ep_end
} episodes_e;

menuitem_t EpisodeMenu[]=
{
    {1,"M_EPI1", M_Episode,'k'},
    {1,"M_EPI2", M_Episode,'t'},
    {1,"M_EPI3", M_Episode,'i'},
    {1,"M_EPI4", M_Episode,'t'}
};

menu_t	EpiDef =
{
    ep_end,				// # of menu items
    &MainDef,			// previous menu
    EpisodeMenu,		// menuitem_t ->
    M_DrawEpisode,		// drawing routine ->
    48,63,				// x,y
    ep1					// lastOn
};

//
// NEW GAME
//
enum
{
    killthings,
    toorough,
    hurtme,
    violence,
    nightmare,
    newg_end
} newgame_e;

menuitem_t NewGameMenu[]=
{
    {1,"M_JKILL",		M_ChooseSkill, 'i'},
    {1,"M_ROUGH",		M_ChooseSkill, 'h'},
    {1,"M_HURT",		M_ChooseSkill, 'h'},
    {1,"M_ULTRA",		M_ChooseSkill, 'u'},
    {1,"M_NMARE",		M_ChooseSkill, 'n'}
};

menu_t	NewDef =
{
    newg_end,			// # of menu items
    &EpiDef,			// previous menu
    NewGameMenu,		// menuitem_t ->
    M_DrawNewGame,		// drawing routine ->
    48,63,				// x,y
    hurtme				// lastOn
};



//
// OPTIONS MENU
//
enum
{
    endgame,
    messages,
    detail,
    scrnsize,
    option_empty1,
    mousesens,
    option_empty2,
    soundvol,
    opt_end
} options_e;

menuitem_t OptionsMenu[]=
{
    {1,"M_ENDGAM",		M_EndGame,'e'},
    {1,"M_MESSG",		M_ChangeMessages,'m'},
    {1,"M_DETAIL",		M_ChangeDetail,'g'},
    {2,"M_SCRNSZ",		M_SizeDisplay,'s'},
    {-1,"",0},
    {2,"M_MSENS",		M_ChangeSensitivity,'m'},
    {-1,"",0},
    {1,"M_SVOL",		M_Sound,'s'}
};

menu_t	OptionsDef =
{
    opt_end,
    &MainDef,
    OptionsMenu,
    M_DrawOptions,
    60,37,
    0
};

//
// Read This! MENU 1 & 2
//
enum
{
    rdthsempty1,
    read1_end
} read_e;

menuitem_t ReadMenu1[] =
{
    {1,"",M_ReadThis2,0}
};

menu_t	ReadDef1 =
{
    read1_end,
    &MainDef,
    ReadMenu1,
    M_DrawReadThis1,
    280,185,
    0
};

enum
{
    rdthsempty2,
    read2_end
} read_e2;

menuitem_t ReadMenu2[]=
{
    {1,"",M_FinishReadThis,0}
};

menu_t	ReadDef2 =
{
    read2_end,
    &ReadDef1,
    ReadMenu2,
    M_DrawReadThis2,
    330,175,
    0
};

//
// SOUND VOLUME MENU
//
enum
{
    sfx_vol,
    sfx_empty1,
    music_vol,
    sfx_empty2,
    sound_end
} sound_e;

menuitem_t SoundMenu[]=
{
    {2,"M_SFXVOL",M_SfxVol,'s'},
    {-1,"",0},
    {2,"M_MUSVOL",M_MusicVol,'m'},
    {-1,"",0}
};

menu_t	SoundDef =
{
    sound_end,
    &OptionsDef,
    SoundMenu,
    M_DrawSound,
    80,64,
    0
};

//
// LOAD GAME MENU
//
enum
{
    load1,
    load2,
    load3,
    load4,
    load5,
    load6,
    load_end
} load_e;

menuitem_t LoadMenu[]=
{
    {1,"", M_LoadSelect,'1'},
    {1,"", M_LoadSelect,'2'},
    {1,"", M_LoadSelect,'3'},
    {1,"", M_LoadSelect,'4'},
    {1,"", M_LoadSelect,'5'},
    {1,"", M_LoadSelect,'6'}
};

menu_t	LoadDef =
{
    load_end,
    &MainDef,
    LoadMenu,
    M_DrawLoad,
    80,54,
    0
};

//
// SAVE GAME MENU
//
menuitem_t SaveMenu[]=
{
    {1,"", M_SaveSelect,'1'},
    {1,"", M_SaveSelect,'2'},
    {1,"", M_SaveSelect,'3'},
    {1,"", M_SaveSelect,'4'},
    {1,"", M_SaveSelect,'5'},
    {1,"", M_SaveSelect,'6'}
};

menu_t	SaveDef =
{
    load_end,
    &MainDef,
    SaveMenu,
    M_DrawSave,
    80,54,
    0
};


//
// M_ReadSaveStrings
//	read the strings from the savegame files
//
void M_ReadSaveStrings(void)
{
#if 0
    int				handle;
    int				count;
    int				i;
    char	name[256];

    for (i = 0; i < load_end; i++)
    {
        if (M_CheckParm("-cdrom"))
            sprintf(name,"c:\\doomdata\\"SAVEGAMENAME"%d.dsg",i);
        else
            sprintf(name,SAVEGAMENAME"%d.dsg",i);

        handle = open (name, O_RDONLY | 0, 0666);
        if (handle == -1)
        {
            strcpy(&savegamestrings[i][0],EMPTYSTRING);
            LoadMenu[i].status = 0;
            continue;
        }
        count = read (handle, &savegamestrings[i], SAVESTRINGSIZE);
        close (handle);
        LoadMenu[i].status = 1;
    }
#endif
}


//
// M_LoadGame & Cie.
//
void M_DrawLoad(void)
{
    int				i;

    V_DrawPatchDirect (72,28,0,W_CacheLumpName("M_LOADG",PU_CACHE));
    for (i = 0; i < load_end; i++)
    {
        M_DrawSaveLoadBorder(LoadDef.x,LoadDef.y+LINEHEIGHT*i);
        M_WriteText(LoadDef.x,LoadDef.y+LINEHEIGHT*i,savegamestrings[i]);
    }
}



//
// Draw border for the savegame description
//
void M_DrawSaveLoadBorder(int x,int y)
{
    int				i;

    V_DrawPatchDirect (x-8,y+7,0,W_CacheLumpName("M_LSLEFT",PU_CACHE));

    for (i = 0; i < 24; i++)
    {
        V_DrawPatchDirect (x,y+7,0,W_CacheLumpName("M_LSCNTR",PU_CACHE));
        x += 8;
    }

    V_DrawPatchDirect (x,y+7,0,W_CacheLumpName("M_LSRGHT",PU_CACHE));
}



//
// User wants to load this game
//
void M_LoadSelect(int choice)
{
    char	name[256];

    if (M_CheckParm("-cdrom"))
        sprintf(name,"c:\\doomdata\\"SAVEGAMENAME"%d.dsg",choice);
    else
        sprintf(name,SAVEGAMENAME"%d.dsg",choice);
    G_LoadGame (name);
    M_ClearMenus ();
}

//
// Selected from DOOM menu
//
void M_LoadGame (int choice)
{
    if (netgame)
    {
        M_StartMessage(LOADNET,NULL,false);
        return;
    }

    M_SetupNextMenu(&LoadDef);
    M_ReadSaveStrings();
}


//
//	M_SaveGame & Cie.
//
void M_DrawSave(void)
{
    int				i;

    V_DrawPatchDirect (72,28,0,W_CacheLumpName("M_SAVEG",PU_CACHE));
    for (i = 0; i < load_end; i++)
    {
        M_DrawSaveLoadBorder(LoadDef.x,LoadDef.y+LINEHEIGHT*i);
        M_WriteText(LoadDef.x,LoadDef.y+LINEHEIGHT*i,savegamestrings[i]);
    }

    if (saveStringEnter)
    {
        i = M_StringWidth(savegamestrings[saveSlot]);
        M_WriteText(LoadDef.x + i,LoadDef.y+LINEHEIGHT*saveSlot,"_");
    }
}

//
// M_Responder calls this when user is finished
//
void M_DoSave(int slot)
{
    G_SaveGame (slot,savegamestrings[slot]);
    M_ClearMenus ();

    // PICK QUICKSAVE SLOT YET?
    if (quickSaveSlot == -2)
        quickSaveSlot = slot;
}

//
// User wants to save. Start string input for M_Responder
//
void M_SaveSelect(int choice)
{
    // we are going to be intercepting all chars
    saveStringEnter = 1;

    saveSlot = choice;
    strcpy(saveOldString,savegamestrings[choice]);
    if (!strcmp(savegamestrings[choice],EMPTYSTRING))
        savegamestrings[choice][0] = 0;
    saveCharIndex = strlen(savegamestrings[choice]);
}

//
// Selected from DOOM menu
//
void M_SaveGame (int choice)
{
    if (!usergame)
    {
        M_StartMessage(SAVEDEAD,NULL,false);
        return;
    }

    if (gamestate != GS_LEVEL)
        return;

    M_SetupNextMenu(&SaveDef);
    M_ReadSaveStrings();
}



//
//		M_QuickSave
//
char	tempstring[80];

void M_QuickSaveResponse(int ch)
{
    if (ch == 'y')
    {
        M_DoSave(quickSaveSlot);
        S_StartSound(NULL,sfx_swtchx);
    }
}

void M_QuickSave(void)
{
    if (!usergame)
    {
        S_StartSound(NULL,sfx_oof);
        return;
    }

    if (gamestate != GS_LEVEL)
        return;

    if (quickSaveSlot < 0)
    {
        M_StartControlPanel();
        M_ReadSaveStrings();
        M_SetupNextMenu(&SaveDef);
        quickSaveSlot = -2;		// means to pick a slot now
        return;
    }
    sprintf(tempstring,QSPROMPT,savegamestrings[quickSaveSlot]);
    M_StartMessage(tempstring,M_QuickSaveResponse,true);
}



//
// M_QuickLoad
//
void M_QuickLoadResponse(int ch)
{
    if (ch == 'y')
    {
        M_LoadSelect(quickSaveSlot);
        S_StartSound(NULL,sfx_swtchx);
    }
}


void M_QuickLoad(void)
{
    if (netgame)
    {
        M_StartMessage(QLOADNET,NULL,false);
        return;
    }

    if (quickSaveSlot < 0)
    {
        M_StartMessage(QSAVESPOT,NULL,false);
        return;
    }
    sprintf(tempstring,QLPROMPT,savegamestrings[quickSaveSlot]);
    M_StartMessage(tempstring,M_QuickLoadResponse,true);
}




//
// Read This Menus
// Had a "quick hack to fix romero bug"
//
void M_DrawReadThis1(void)
{
    inhelpscreens = true;
    switch ( gamemode )
    {
        case commercial:
            V_DrawPatchDirect (0,0,0,W_CacheLumpName("HELP",PU_CACHE));
            break;
        case shareware:
        case registered:
        case retail:
            V_DrawPatchDirect (0,0,0,W_CacheLumpName("HELP1",PU_CACHE));
            break;
        default:
            break;
    }
    return;
}



//
// Read This Menus - optional second page.
//
void M_DrawReadThis2(void)
{
    inhelpscreens = true;
    switch ( gamemode )
    {
        case retail:
        case commercial:
            // This hack keeps us from having to change menus.
            V_DrawPatchDirect (0,0,0,W_CacheLumpName("CREDIT",PU_CACHE));
            break;
        case shareware:
        case registered:
            V_DrawPatchDirect (0,0,0,W_CacheLumpName("HELP2",PU_CACHE));
            break;
        default:
            break;
    }
    return;
}


//
// Change Sfx & Music volumes
//
void M_DrawSound(void)
{
    V_DrawPatchDirect (60,38,0,W_CacheLumpName("M_SVOL",PU_CACHE));

    M_DrawThermo(SoundDef.x,SoundDef.y+LINEHEIGHT*(sfx_vol+1),
                 16,snd_SfxVolume);

    M_DrawThermo(SoundDef.x,SoundDef.y+LINEHEIGHT*(music_vol+1),
                 16,snd_MusicVolume);
}

void M_Sound(int choice)
{
    M_SetupNextMenu(&SoundDef);
}

void M_SfxVol(int choice)
{
    switch(choice)
    {
        case 0:
            if (snd_SfxVolume)
                snd_SfxVolume--;
            break;
        case 1:
            if (snd_SfxVolume < 15)
                snd_SfxVolume++;
            break;
    }

    S_SetSfxVolume(snd_SfxVolume /* *8 */);
}

void M_MusicVol(int choice)
{
    switch(choice)
    {
        case 0:
            if (snd_MusicVolume)
                snd_MusicVolume--;
            break;
        case 1:
            if (snd_MusicVolume < 15)
                snd_MusicVolume++;
            break;
    }

    S_SetMusicVolume(snd_MusicVolume /* *8 */);
}




//
// M_DrawMainMenu
//
void M_DrawMainMenu(void)
{
    V_DrawPatchDirect (94,2,0,W_CacheLumpName("M_DOOM",PU_CACHE));
}




//
// M_NewGame
//
void M_DrawNewGame(void)
{
    V_DrawPatchDirect (96,14,0,W_CacheLumpName("M_NEWG",PU_CACHE));
    V_DrawPatchDirect (54,38,0,W_CacheLumpName("M_SKILL",PU_CACHE));
}

void M_NewGame(int choice)
{
    if (netgame && !demoplayback)
    {
        M_StartMessage(NEWGAME,NULL,false);
        return;
    }

    if ( gamemode == commercial )
        M_SetupNextMenu(&NewDef);
    else
        M_SetupNextMenu(&EpiDef);
}


//
//		M_Episode
//
int		epi;

void M_DrawEpisode(void)
{
    V_DrawPatchDirect (54,38,0,W_CacheLumpName("M_EPISOD",PU_CACHE));
}

void M_VerifyNightmare(int ch)
{
    if (ch != 'y')
        return;

    G_DeferedInitNew(nightmare,epi+1,1);
    M_ClearMenus ();
}

void M_ChooseSkill(int choice)
{
    if (choice == nightmare)
    {
        M_StartMessage(NIGHTMARE,M_VerifyNightmare,true);
        return;
    }

    G_DeferedInitNew(choice,epi+1,1);
    M_ClearMenus ();
}

void M_Episode(int choice)
{
    if ( (gamemode == shareware)
            && choice)
    {
        M_StartMessage(SWSTRING,NULL,false);
        M_SetupNextMenu(&ReadDef1);
        return;
    }

    // Yet another hack...
    if ( (gamemode == registered)
            && (choice > 2))
    {
        //fprintf( stderr, "M_Episode: 4th episode requires UltimateDOOM\n");
        choice = 0;
    }

    epi = choice;
    M_SetupNextMenu(&NewDef);
}



//
// M_Options
//
char	detailNames[2][9]		= {"M_GDHIGH","M_GDLOW"};
char	msgNames[2][9]			= {"M_MSGOFF","M_MSGON"};


void M_DrawOptions(void)
{
    V_DrawPatchDirect (108,15,0,W_CacheLumpName("M_OPTTTL",PU_CACHE));

    V_DrawPatchDirect (OptionsDef.x + 175,OptionsDef.y+LINEHEIGHT*detail,0,
                       W_CacheLumpName(detailNames[detailLevel],PU_CACHE));

    V_DrawPatchDirect (OptionsDef.x + 120,OptionsDef.y+LINEHEIGHT*messages,0,
                       W_CacheLumpName(msgNames[showMessages],PU_CACHE));

    M_DrawThermo(OptionsDef.x,OptionsDef.y+LINEHEIGHT*(mousesens+1),
                 10,mouseSensitivity);

    M_DrawThermo(OptionsDef.x,OptionsDef.y+LINEHEIGHT*(scrnsize+1),
                 9,screenSize);
}

void M_Options(int choice)
{
    M_SetupNextMenu(&OptionsDef);
}



//
//		Toggle messages on/off
//
void M_ChangeMessages(int choice)
{
    // warning: unused parameter `int choice'
    choice = 0;
    showMessages = 1 - showMessages;

    if (!showMessages)
        players[consoleplayer].message = MSGOFF;
    else
        players[consoleplayer].message = MSGON ;

    message_dontfuckwithme = true;
}


//
// M_EndGame
//
void M_EndGameResponse(int ch)
{
    if (ch != 'y')
        return;

    currentMenu->lastOn = itemOn;
    M_ClearMenus ();
    D_StartTitle ();
}

void M_EndGame(int choice)
{
    choice = 0;
    if (!usergame)
    {
        S_StartSound(NULL,sfx_oof);
        return;
    }

    if (netgame)
    {
        M_StartMessage(NETEND,NULL,false);
        return;
    }

    M_StartMessage(ENDGAME,M_EndGameResponse,true);
}




//
// M_ReadThis
//
void M_ReadThis(int choice)
{
    choice = 0;
    M_SetupNextMenu(&ReadDef1);
}

void M_ReadThis2(int choice)
{
    choice = 0;
    M_SetupNextMenu(&ReadDef2);
}

void M_FinishReadThis(int choice)
{
    choice = 0;
    M_SetupNextMenu(&MainDef);
}




//
// M_QuitDOOM
//
int		quitsounds[8] =
{
    sfx_pldeth,
    sfx_dmpain,
    sfx_popain,
    sfx_slop,
    sfx_telept,
    sfx_posit1,
    sfx_posit3,
    sfx_sgtatk
};

int		quitsounds2[8] =
{
    sfx_vilact,
    sfx_getpow,
    sfx_boscub,
    sfx_slop,
    sfx_skeswg,
    sfx_kntdth,
    sfx_bspact,
    sfx_sgtatk
};



void M_QuitResponse(int ch)
{
    if (ch != 'y')
        return;
    if (!netgame)
    {
        if (gamemode == commercial)
            S_StartSound(NULL,quitsounds2[(gametic>>2)&7]);
        else
            S_StartSound(NULL,quitsounds[(gametic>>2)&7]);
        I_WaitVBL(105);
    }
    I_Quit ();
}




void M_QuitDOOM(int choice)
{
    // We pick index 0 which is language sensitive,
    //  or one at random, between 1 and maximum number.
    if (language != english )
        sprintf(endstring,"%s\n\n"DOSY, endmsg[0] );
    else
        sprintf(endstring,"%s\n\n"DOSY, endmsg[ (gametic%(NUM_QUITMESSAGES-2))+1 ]);

    M_StartMessage(endstring,M_QuitResponse,true);
}




void M_ChangeSensitivity(int choice)
{
    switch(choice)
    {
        case 0:
            if (mouseSensitivity)
                mouseSensitivity--;
            break;
        case 1:
            if (mouseSensitivity < 9)
                mouseSensitivity++;
            break;
    }
}




void M_ChangeDetail(int choice)
{
    choice = 0;
    detailLevel = 1 - detailLevel;

    // FIXME - does not work. Remove anyway?
    // fprintf( stderr, "M_ChangeDetail: low detail mode n.a.\n");

    return;

    /*R_SetViewSize (screenblocks, detailLevel);

    if (!detailLevel)
    	players[consoleplayer].message = DETAILHI;
    else
    	players[consoleplayer].message = DETAILLO;*/
}




void M_SizeDisplay(int choice)
{
    switch(choice)
    {
        case 0:
            if (screenSize > 0)
            {
                screenblocks--;
                screenSize--;
            }
            break;
        case 1:
            if (screenSize < 8)
            {
                screenblocks++;
                screenSize++;
            }
            break;
    }


    R_SetViewSize (screenblocks, detailLevel);
}




//
//		Menu Functions
//
void
M_DrawThermo
( int	x,
  int	y,
  int	thermWidth,
  int	thermDot )
{
    int			xx;
    int			i;

    xx = x;
    V_DrawPatchDirect (xx,y,0,W_CacheLumpName("M_THERML",PU_CACHE));
    xx += 8;
    for (i=0; i<thermWidth; i++)
    {
        V_DrawPatchDirect (xx,y,0,W_CacheLumpName("M_THERMM",PU_CACHE));
        xx += 8;
    }
    V_DrawPatchDirect (xx,y,0,W_CacheLumpName("M_THERMR",PU_CACHE));

    V_DrawPatchDirect ((x+8) + thermDot*8,y,
                       0,W_CacheLumpName("M_THERMO",PU_CACHE));
}



void
M_DrawEmptyCell
( menu_t*		menu,
  int			item )
{
    V_DrawPatchDirect (menu->x - 10,		menu->y+item*LINEHEIGHT - 1, 0,
                       W_CacheLumpName("M_CELL1",PU_CACHE));
}

void
M_DrawSelCell
( menu_t*		menu,
  int			item )
{
    V_DrawPatchDirect (menu->x - 10,		menu->y+item*LINEHEIGHT - 1, 0,
                       W_CacheLumpName("M_CELL2",PU_CACHE));
}


void
M_StartMessage
( char*			string,
  void*			routine,
  boolean		input )
{
    messageLastMenuActive = menuactive;
    messageToPrint = 1;
    messageString = string;
    messageRoutine = routine;
    messageNeedsInput = input;
    menuactive = true;
    return;
}



void M_StopMessage(void)
{
    menuactive = messageLastMenuActive;
    messageToPrint = 0;
}



//
// Find string width from hu_font chars
//
int M_StringWidth(char* string)
{
    int				i;
    int				w = 0;
    int				c;

    for (i = 0; i < strlen(string); i++)
    {
        c = toupper(string[i]) - HU_FONTSTART;
        if (c < 0 || c >= HU_FONTSIZE)
            w += 4;
        else
            w += SHORT (hu_font[c]->width);
    }

    return w;
}



//
//		Find string height from hu_font chars
//
int M_StringHeight(char* string)
{
    int				i;
    int				h;
    int				height = SHORT(hu_font[0]->height);

    h = height;
    for (i = 0; i < strlen(string); i++)
        if (string[i] == '\n')
            h += height;

    return h;
}


//
//		Write a string using the hu_font
//
void
M_WriteText
( int			x,
  int			y,
  char*			string)
{
    int			w;
    char*		ch;
    int			c;
    int			cx;
    int			cy;

    ch = string;
    cx = x;
    cy = y;

    while(1)
    {
        c = *ch++;
        if (!c)
            break;
        if (c == '\n')
        {
            cx = x;
            cy += 12;
            continue;
        }

        c = toupper(c) - HU_FONTSTART;
        if (c < 0 || c>= HU_FONTSIZE)
        {
            cx += 4;
            continue;
        }

        w = SHORT (hu_font[c]->width);
        if (cx+w > SCREENWIDTH)
            break;
        V_DrawPatchDirect(cx, cy, 0, hu_font[c]);
        cx+=w;
    }
}



//
// CONTROL PANEL
//

//
// M_Responder
//
boolean M_Responder (event_t* ev)
{
    int				ch;
    int				i;
    static	int		joywait = 0;
    static	int		mousewait = 0;
    static	int		mousey = 0;
    static	int		lasty = 0;
    static	int		mousex = 0;
    static	int		lastx = 0;

    ch = -1;

    if (ev->type == ev_joystick && joywait < I_GetTime())
    {
        if (ev->data3 == -1)
        {
            ch = KEY_UPARROW;
            joywait = I_GetTime() + 5;
        }
        else if (ev->data3 == 1)
        {
            ch = KEY_DOWNARROW;
            joywait = I_GetTime() + 5;
        }

        if (ev->data2 == -1)
        {
            ch = KEY_LEFTARROW;
            joywait = I_GetTime() + 2;
        }
        else if (ev->data2 == 1)
        {
            ch = KEY_RIGHTARROW;
            joywait = I_GetTime() + 2;
        }

        if (ev->data1&1)
        {
            ch = KEY_ENTER;
            joywait = I_GetTime() + 5;
        }
        if (ev->data1&2)
        {
            ch = KEY_BACKSPACE;
            joywait = I_GetTime() + 5;
        }
    }
    else
    {
        if (ev->type == ev_mouse && mousewait < I_GetTime())
        {
            mousey += ev->data3;
            if (mousey < lasty-30)
            {
                ch = KEY_DOWNARROW;
                mousewait = I_GetTime() + 5;
                mousey = lasty -= 30;
            }
            else if (mousey > lasty+30)
            {
                ch = KEY_UPARROW;
                mousewait = I_GetTime() + 5;
                mousey = lasty += 30;
            }

            mousex += ev->data2;
            if (mousex < lastx-30)
            {
                ch = KEY_LEFTARROW;
                mousewait = I_GetTime() + 5;
                mousex = lastx -= 30;
            }
            else if (mousex > lastx+30)
            {
                ch = KEY_RIGHTARROW;
                mousewait = I_GetTime() + 5;
                mousex = lastx += 30;
            }

            if (ev->data1&1)
            {
                ch = KEY_ENTER;
                mousewait = I_GetTime() + 15;
            }

            if (ev->data1&2)
            {
                ch = KEY_BACKSPACE;
                mousewait = I_GetTime() + 15;
            }
        }
        else if (ev->type == ev_keydown)
        {
            ch = ev->data1;
        }
    }

    if (ch == -1)
        return false;


    // Save Game string input
    if (saveStringEnter)
    {
        switch(ch)
        {
            case KEY_BACKSPACE:
                if (saveCharIndex > 0)
                {
                    saveCharIndex--;
                    savegamestrings[saveSlot][saveCharIndex] = 0;
                }
                break;

            case KEY_ESCAPE:
                saveStringEnter = 0;
                strcpy(&savegamestrings[saveSlot][0],saveOldString);
                break;

            case KEY_ENTER:
                saveStringEnter = 0;
                if (savegamestrings[saveSlot][0])
                    M_DoSave(saveSlot);
                break;

            default:
                ch = toupper(ch);
                if (ch != 32)
                    if (ch-HU_FONTSTART < 0 || ch-HU_FONTSTART >= HU_FONTSIZE)
                        break;
                if (ch >= 32 && ch <= 127 &&
                        saveCharIndex < SAVESTRINGSIZE-1 &&
                        M_StringWidth(savegamestrings[saveSlot]) <
                        (SAVESTRINGSIZE-2)*8)
                {
                    savegamestrings[saveSlot][saveCharIndex++] = ch;
                    savegamestrings[saveSlot][saveCharIndex] = 0;
                }
                break;
        }
        return true;
    }

    // Take care of any messages that need input
    if (messageToPrint)
    {
        if (messageNeedsInput == true &&
                !(ch == ' ' || ch == 'n' || ch == 'y' || ch == KEY_ESCAPE))
            return false;

        menuactive = messageLastMenuActive;
        messageToPrint = 0;
        if (messageRoutine)
            messageRoutine(ch);

        menuactive = false;
        S_StartSound(NULL,sfx_swtchx);
        return true;
    }

    if (devparm && ch == KEY_F1)
    {
        G_ScreenShot ();
        return true;
    }


    // F-Keys
    if (!menuactive)
        switch(ch)
        {
            case KEY_MINUS:		  // Screen size down
                if (automapactive || chat_on)
                    return false;
                M_SizeDisplay(0);
                S_StartSound(NULL,sfx_stnmov);
                return true;

            case KEY_EQUALS:		  // Screen size up
                if (automapactive || chat_on)
                    return false;
                M_SizeDisplay(1);
                S_StartSound(NULL,sfx_stnmov);
                return true;

            case KEY_F1:			  // Help key
                M_StartControlPanel ();

                if ( gamemode == retail )
                    currentMenu = &ReadDef2;
                else
                    currentMenu = &ReadDef1;

                itemOn = 0;
                S_StartSound(NULL,sfx_swtchn);
                return true;

            case KEY_F2:			  // Save
                M_StartControlPanel();
                S_StartSound(NULL,sfx_swtchn);
                M_SaveGame(0);
                return true;

            case KEY_F3:			  // Load
                M_StartControlPanel();
                S_StartSound(NULL,sfx_swtchn);
                M_LoadGame(0);
                return true;

            case KEY_F4:			  // Sound Volume
                M_StartControlPanel ();
                currentMenu = &SoundDef;
                itemOn = sfx_vol;
                S_StartSound(NULL,sfx_swtchn);
                return true;

            case KEY_F5:			  // Detail toggle
                M_ChangeDetail(0);
                S_StartSound(NULL,sfx_swtchn);
                return true;

            case KEY_F6:			  // Quicksave
                S_StartSound(NULL,sfx_swtchn);
                M_QuickSave();
                return true;

            case KEY_F7:			  // End game
                S_StartSound(NULL,sfx_swtchn);
                M_EndGame(0);
                return true;

            case KEY_F8:			  // Toggle messages
                M_ChangeMessages(0);
                S_StartSound(NULL,sfx_swtchn);
                return true;

            case KEY_F9:			  // Quickload
                S_StartSound(NULL,sfx_swtchn);
                M_QuickLoad();
                return true;

            case KEY_F10:			  // Quit DOOM
                S_StartSound(NULL,sfx_swtchn);
                M_QuitDOOM(0);
                return true;

            case KEY_F11:			  // gamma toggle
                usegamma++;
                if (usegamma > 4)
                    usegamma = 0;
                players[consoleplayer].message = gammamsg[usegamma];
                I_SetPalette (W_CacheLumpName ("PLAYPAL",PU_CACHE));
                return true;

        }


    // Pop-up menu?
    if (!menuactive)
    {
        if (ch == KEY_ESCAPE)
        {
            M_StartControlPanel ();
            S_StartSound(NULL,sfx_swtchn);
            return true;
        }
        return false;
    }


    // Keys usable within menu
    switch (ch)
    {
        case KEY_DOWNARROW:
            do
            {
                if (itemOn+1 > currentMenu->numitems-1)
                    itemOn = 0;
                else itemOn++;
                S_StartSound(NULL,sfx_pstop);
            } while(currentMenu->menuitems[itemOn].status==-1);
            return true;

        case KEY_UPARROW:
            do
            {
                if (!itemOn)
                    itemOn = currentMenu->numitems-1;
                else itemOn--;
                S_StartSound(NULL,sfx_pstop);
            } while(currentMenu->menuitems[itemOn].status==-1);
            return true;

        case KEY_LEFTARROW:
            if (currentMenu->menuitems[itemOn].routine &&
                    currentMenu->menuitems[itemOn].status == 2)
            {
                S_StartSound(NULL,sfx_stnmov);
                currentMenu->menuitems[itemOn].routine(0);
            }
            return true;

        case KEY_RIGHTARROW:
            if (currentMenu->menuitems[itemOn].routine &&
                    currentMenu->menuitems[itemOn].status == 2)
            {
                S_StartSound(NULL,sfx_stnmov);
                currentMenu->menuitems[itemOn].routine(1);
            }
            return true;

        case KEY_ENTER:
            if (currentMenu->menuitems[itemOn].routine &&
                    currentMenu->menuitems[itemOn].status)
            {
                currentMenu->lastOn = itemOn;
                if (currentMenu->menuitems[itemOn].status == 2)
                {
                    currentMenu->menuitems[itemOn].routine(1);		// right arrow
                    S_StartSound(NULL,sfx_stnmov);
                }
                else
                {
                    currentMenu->menuitems[itemOn].routine(itemOn);
                    S_StartSound(NULL,sfx_pistol);
                }
            }
            return true;

        case KEY_ESCAPE:
            currentMenu->lastOn = itemOn;
            M_ClearMenus ();
            S_StartSound(NULL,sfx_swtchx);
            return true;

        case KEY_BACKSPACE:
            currentMenu->lastOn = itemOn;
            if (currentMenu->prevMenu)
            {
                currentMenu = currentMenu->prevMenu;
                itemOn = currentMenu->lastOn;
                S_StartSound(NULL,sfx_swtchn);
            }
            return true;

        default:
            for (i = itemOn+1; i < currentMenu->numitems; i++)
                if (currentMenu->menuitems[i].alphaKey == ch)
                {
                    itemOn = i;
                    S_StartSound(NULL,sfx_pstop);
                    return true;
                }
            for (i = 0; i <= itemOn; i++)
                if (currentMenu->menuitems[i].alphaKey == ch)
                {
                    itemOn = i;
                    S_StartSound(NULL,sfx_pstop);
                    return true;
                }
            break;

    }

    return false;
}



//
// M_StartControlPanel
//
void M_StartControlPanel (void)
{
    // intro might call this repeatedly
    if (menuactive)
        return;

    menuactive = 1;
    currentMenu = &MainDef;			// JDC
    itemOn = currentMenu->lastOn;	// JDC
}


//
// M_Drawer
// Called after the view has been rendered,
// but before it has been blitted.
//
void M_Drawer (void)
{
    static short		x;
    static short		y;
    short				i;
    short				max;
    char				string[40];
    int					start;

    inhelpscreens = false;

    // Horiz. & Vertically center string and print it.
    if (messageToPrint)
    {
        start = 0;
        y = 100 - M_StringHeight(messageString)/2;
        while(*(messageString+start))
        {
            for (i = 0; i < strlen(messageString+start); i++)
                if (*(messageString+start+i) == '\n')
                {
                    memset(string,0,40);
                    strncpy(string,messageString+start,i);
                    start += i+1;
                    break;
                }

            if (i == strlen(messageString+start))
            {
                strcpy(string,messageString+start);
                start += i;
            }

            x = 160 - M_StringWidth(string)/2;
            M_WriteText(x,y,string);
            y += SHORT(hu_font[0]->height);
        }
        return;
    }

    if (!menuactive)
        return;

    if (currentMenu->routine)
        currentMenu->routine();			// call Draw routine

    // DRAW MENU
    x = currentMenu->x;
    y = currentMenu->y;
    max = currentMenu->numitems;

    for (i=0; i<max; i++)
    {
        if (currentMenu->menuitems[i].name[0])
            V_DrawPatchDirect (x,y,0,
                               W_CacheLumpName(currentMenu->menuitems[i].name ,PU_CACHE));
        y += LINEHEIGHT;
    }


    // DRAW SKULL
    V_DrawPatchDirect(x + SKULLXOFF,currentMenu->y - 5 + itemOn*LINEHEIGHT, 0,
                      W_CacheLumpName(skullName[whichSkull],PU_CACHE));

}


//
// M_ClearMenus
//
void M_ClearMenus (void)
{
    menuactive = 0;
    // if (!netgame && usergame && paused)
    //		 sendpause = true;
}




//
// M_SetupNextMenu
//
void M_SetupNextMenu(menu_t *menudef)
{
    currentMenu = menudef;
    itemOn = currentMenu->lastOn;
}


//
// M_Ticker
//
void M_Ticker (void)
{
    if (--skullAnimCounter <= 0)
    {
        whichSkull ^= 1;
        skullAnimCounter = 8;
    }
}


//
// M_Init
//
void M_Init (void)
{
    currentMenu = &MainDef;
    menuactive = 0;
    itemOn = currentMenu->lastOn;
    whichSkull = 0;
    skullAnimCounter = 10;
    screenSize = screenblocks - 3;
    messageToPrint = 0;
    messageString = NULL;
    messageLastMenuActive = menuactive;
    quickSaveSlot = -1;

    // Here we could catch other version dependencies,
    //	like HELP1/2, and four episodes.


    switch ( gamemode )
    {
        case commercial:
            // This is used because DOOM 2 had only one HELP
            //	page. I use CREDIT as second page now, but
            //	kept this hack for educational purposes.
            MainMenu[readthis] = MainMenu[quitdoom];
            MainDef.numitems--;
            MainDef.y += 8;
            NewDef.prevMenu = &MainDef;
            ReadDef1.routine = M_DrawReadThis1;
            ReadDef1.x = 330;
            ReadDef1.y = 165;
            ReadMenu1[0].routine = M_FinishReadThis;
            break;
        case shareware:
        // Episode 2 and 3 are handled,
        //	branching to an ad screen.
        case registered:
            // We need to remove the fourth episode.
            EpiDef.numitems--;
            break;
        case retail:
        // We are fine.
        default:
            break;
    }

}

